/*****************************************************************************
 * Copyright (C) jparsec.org                                                *
 * ------------------------------------------------------------------------- *
 * Licensed under the Apache License, Version 2.0 (the "License");           *
 * you may not use this file except in compliance with the License.          *
 * You may obtain a copy of the License at                                   *
 *                                                                           *
 * http://www.apache.org/licenses/LICENSE-2.0                                *
 *                                                                           *
 * Unless required by applicable law or agreed to in writing, software       *
 * distributed under the License is distributed on an "AS IS" BASIS,         *
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  *
 * See the License for the specific language governing permissions and       *
 * limitations under the License.                                            *
 *****************************************************************************/
package org.jparsec;

import java.util.Comparator;
import java.util.Locale;
import java.util.function.Function;

enum StringCase implements Comparator<String> {
  CASE_SENSITIVE {
    @Override public int compare(String a, String b) {
      return a.compareTo(b);
    }
    @Override String toKey(String k) {
      return k;
    }
  },
  CASE_INSENSITIVE {
    @Override public int compare(String a, String b) {
      return a.compareToIgnoreCase(b);
    }
    @Override public String toKey(String k) {
      return k.toLowerCase(Locale.ENGLISH);
    }
  }
  ;

  abstract String toKey(String k);

  final <T> Function<String, T> byKey(Function<String, T> function) {
    return k -> function.apply(toKey(k));
  }
}